Spring-scraper construction



- Feb; 12 1924. 1,483,246

F. N. ROOT SPRING SCRAPER CONSTRUCTION Filed May 16. 1922 INVENTOR. fl ed 4 fioof A TT ORNEYS Patented Feb. 12, 1924.

Lddlt lt FRED N. ROOT, OF KALAMAZOO, MICHIGAN.

SPBING-SGRAPER CONSTRUCTION.

Application filed May 16, 1922., Serial No.- 561,548.

To all whom it may concern:

Be itlrnown that I, FRED N. Roo'r, a-citizen of the United States, residing at the city and county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Spring-Scraper Constructions, of which the following is a specification.

Thisinvention relates to improved spring scraper construction.

The object of the invention is to provide an improved and reinforced spring structure for this purpose. The same is espe-. cially designed to improve and strengthen the structure of my former Patent No. 934,630, issued September 21, 1909.

Objects pertaining to details and economies of construction and operation will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodi ment of the invention is fully illustrated in the accompanying drawings forming a part of this specification, in which:

Fig. I is a perspective view of my improved spring scraper with a pair of my improved spring arms in position.

Fig. II is an enlarged detail end sectional view taken on line 22 of Figs. I and III showing the manner of clamping my improved spring'and the details of construction.

Fig. III is an enlarged detail sectional view on the irregular section line 3 -3 of Fig. II, showing the relation of the clip.

Fig. IV is a detail view of the end of the spring showing the notches for receiving the clip bolt.

Fig. V is a rear view of one of the spring structures from the left side of Fig. II, not so much enlarged.

In the drawings the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar numerals of reference refer to similar parts throughout the several views.

The numbered parts of the drawing will be considered by their numbers. 1 is the rockershaft. 2 is the scraper blade and 3 is the main curved blade spring arm connection from the said rockershaft to the said blade,'the same having a straight portion 4: secured to the main blade by pairsof screw-bolts 5 and 6. A tempered cutter blade 7 is secured to the bottom of the main blade by the lower screw-bolts 6 and projects beneath the same as seen in the end elevation view in Fig. II.

8 is my improved reinforcing spring conformed to the main spring?) and having a vertical portion 41 backing up the main spring, the same being clamped to the main spring to the U-clip bolt 10 having nuts 11 thereon. A guard plate 12 is secured by these nuts 11 to increase the width of the scraper which is of especial advantage in handling snow or the like, and increasing the width of the blade at a point where its resistance'can be greatly minimized.

The curved ends of the springs 3 and 8 embrace the rockershaft 1 and are engaged by the cross clamp bar or clip 13 which is drawn securely to place by 'the cross bolts 1d having head 15 suitably seated in the said cross clip bar and provided with lock nut 16 at the upper end. The sides of the springs 3 and 8 are notched at 14%, see Figs. III and IV, for receiving the said clip bolts 14 which retains them in fixed relation to the said rockershaft 1, compelling them to do their full work when they are clamped together by the U-clip bolt 10 at the point indicated.

The lower end of the vertical portion 9 should be beveled to a point as indicated in Fig. V to insure best results after the manner of the best practice in leaf spring construction. Experience demonstrates that the main spring and the auxiliary spring embracing the main spring and conformed thereto are effectively retained in position and the full benefit of the same is secured owing to the semicircular notches on the opposite sides thereof, which insure the effective relation of the parts to the rock shaft.

Having thus described my improved spring scraper structure I will state that I desire to claim the same in its precise form illustrated and also to claim the same broadly as pointed out in the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination of a rocker-shaft, a series of blade springs with flat straight end portion, with curved engaging portions suitably notched and clipped to the said rocker shaft by cross clip bar secured by cross bolts, the said springs being conformed and clamped together by U-bolts, and a scraper blade structure secured to the straight por tion thereof, all coacting substantially as described for the purpose specified.

2. In a'scraper structure, the combination of a rocker shaft, a main spring, arm connected to the rocker shaft and carrying the scraper blade, and anauxiliary spring embracing and conformed to the said main spring and extending around the curved portion to reinforce the same, beingsuitably notched andclipped thereto by a clip. engaging saidnotches. c

3. In a scraper structure, the combination of a rocker shaft, a main spring arm connected to the rocker shaft and carrying thescraper blade, and an auxiliary spring embracing and conformed to the said main spring and extending around the curved portion and clipped thereto to reinforce the same.

4. In a structure of the class described, the combination of a main spring support With curved portion, an auxiliary reinforcing spring conformed thereto, and clip means embracing and engaging both said springs for retaining the parts together, as specified.

In Witness whereof, I have hereunto set my handand seal. 7

FRED N. ROOT. [us] 

